Masahiko Ibamoto

This inventor holds 62 USPTO granted patents and 3 EPO patents, primarily in Automatic Transmission Control (CPC class 4771). Top assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd., Hitachi Automotive Engineering Co., Ltd.. Active years: 1977-2011.

USPTO Granted Patents = 62

% Patents Active = 93.5

EPO Patents = 3 (Patent Applications = 1)

Average Co-Inventor Count = 3.9

ph-index = 19

Forward Citations = 1,013(Granted Patents)

Forward Citations (Not Self Cited) = 980(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Katsuta, JA (1977 - 1978)
Katsuta,, JP (1984)
Ibaraki, JP (1980 - 1998)
Katsuta, JP (1978 - 2000)
Chiyoda-ku, JP (2007)
Hitachinaka, JP (1996 - 2009)
Tokyo, JP (2009 - 2011)

Company Filing History:

Hitachi Car Engineering Co., Ltd.

patents

7 out of 152

Hitachi Automotive Engineering Co., Ltd.

Hitachi, Ltd. and Hitachi Automotive Engineering Co., Ltd.

patents

6. 1 out of 6

Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.

patents

7. 1 out of 834,453

Other

patents

where one patent can have more than one assignee

Years Active: 1977-2011

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Areas of Expertise:

Automatic Transmission

Gear Shifter

Powertrain Control

Dynamo-Electric Machine

Torque Control

Vehicle Control

Shift Change Control

Driving Method

Power Transmission

Drive Shaft Torque

Transmission Control Unit

Active Shift Transmission

62 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7967721 - Control apparatus for an automatic transmission (2011-06-28),

2. 7632209 - Vehicular drive system and driving method (2009-12-15),

3. 7628720 - Vehicle control apparatus and method (2009-12-08),

4. 7476176 - Automatic transmission, dynamo-electric machine, and car (2009-01-13),

5. 7387043 - Method of changing gears of an automobile, automotive gear shifter, controller for automotive gear shifter, and actuator controller for automotive gear shifter (2008-06-17),

6. 7367917 - Shift change control system and automatic transmission system of automobile (2008-05-06),

7. 7331897 - Active shift transmission, transmission control unit and automobile (2008-02-19),

8. 7226379 - Active shift transmission, transmission control unit and automobile (2007-06-05),

9. 7194926 - Method of changing gears of automobile, automotive gear shifter, controller for automotive gear shifter, and actuator controller for automotive gear shifter (2007-03-27),

10. 7150698 - Power transmission apparatus for automobile (2006-12-19),

11. 7093512 - Automatic transmission, dynamo-electric machine, and car (2006-08-22),

12. 7083545 - Automatic transmission system and automobile using the system (2006-08-01),

13. 6941830 - Automatic transmission, dynamo-electric machine, and car (2005-09-13),

14. 6811515 - Transmission control apparatus for an automatic transmission (2004-11-02),

15. 6685591 - Driving apparatus for a vehicle (2004-02-03),

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